Send in your solution (your script and the resulting image) to tom at tomroelandts dot com (sorry for the spam avoidance measure). Your solution can be in MATLAB or Python, but it has to use the ASTRA Toolbox. You can choose any reconstruction algorithm you want. This challenge remains open until the end of March 2014.

I’ll randomly pick a winner from the correct solutions and buy him or her sushi in Antwerp.

[update] The challenge is now closed, and, unfortunately, I have not received any correct solutions… My solution is shown below, together with a Python script that produces it.